周清庄油田下第三系湖相碳酸盐岩储集条件

Paleogene Carbonate Reservoir Conditions of Zhouqingzhuang Oilfield, Tianjin City

在研究岩石薄片和扫描电镜等资料的基础上，对周清庄油田下第三系湖泊相碳酸盐岩储层的储集条件进行了研究。该储层的岩石类型主要为粒屑灰岩，以其中的亮晶鲕粒灰岩和生物清灰岩为最佳储集岩；次生孔隙类型主要有粒间溶孔、粒内溶孔及溶模孔，其发育程度直接决定了碳酸盐岩储层的储集能力；岩性、岩石成分和成岩作用等因素综合控制了周清庄油田湖泊相碳酸盐岩储层次生孔隙的发育。

Based on the thin sections identification and SEM observation,the lakefactes carbonate reservoir of Paleogene has investigated in Zhouqingzhuang oilfield,Tianjin city. The major rock type of the reservoir is grainstone,in which the oolitic spariteand bioclastic limestone are the best reservoir rocks.The secondary pores are mainlyintergranular-solution pores,intragranular-solution pores,cast pores, intercrystallinepores and vugular-solution pores.Development of these pores determines reservoircharacteristics of Paleogene lake factes carbonate in Zhouqingzhuang oilfield. which arecontrolled by the lithological composition and diagenesis.